Signors



No. 606,733. Patented July 5, I898. A. G. NOABK &. L. S. GROSSMAN.

HYDRAUUG AIR COMPRESSOR.

(Application, filed Dec. 24, 1896.)

2 Sheets-Shut I.

(No Mbdel.)

WITNESSES:

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No. 606,733. Patented July 5, 1393-. A. a. NOACK & L. s. GROSSMAN. HYDRAULIC AIR COMPRESSOR.

WITNESSES: INVENTURS.

UNIT STATES- PATENT FicE,

ADOLPI-I e. NOAOK AND LORENZ S. eEosSMA'N, or CLEVELAND, oruo, AS-

SIGNORS, BY MESNE ASSIGNMENTS, To cLEMENT L. v. EVANS, TRUSTEE, or THE BERNER-MAYER COMPANY, OF SAME PLACE.

HYDRA ULIC AIR COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. 606,733, dated July 5, 1898. Application filed December 24. 1 896. Serial No. 616,840. (No model.)

To aZZ whom it may concern: 1

Beit known that we, ADOLPH G. NoAoK and LORENZ S. GRossMAN, citizens of the United States, and residents of Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Hydraulic Air-Compressors, of which the following is a specification, the principle of the invention being herein explained and the :0 best mode in which we have contemplated applying that principle, so as to distinguish it from other inventions. I

The annexed drawings and the following description set forth in detail one mechanical form embodying the invention, Such detail construction'being but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings, Figure I repre- 2o sents an axial section of our improved aircompressor, the valves being illustrated as in position to admit water into the cylinder and the piston being illustrated asnear the upper end of its upstroke; Fig. II, an axial section of the valve mechanism, illustrating the valves in position to exhaust water from the cylinder; and Fig.1II, a section taken at right angles to the sections illustrated in Figs. I

and II of the valve mechanism and illustrat 3o ing the main controlling-valve in position to admit water into the lower end of the cylinder.

The air-compressor has a cylinder 1, the top of which has an air-inlet, valve 2 and an airoutlet valve 3 and has a weighted piston 4, fitted to reciprocate within it. A water-inlet 5 enters through the base 6 of the compressor and a water-outlet 7 is provided through the base. A main controlling-valve casing 8 is 0 provided at the bottom of the air and water cylinder, being preferably formed'upon the base of the cylinder, and said casing has a large actuating-piston chamber 9 at its upper end and a small main controlling-valve cham- 5 ber 10 at its lower end. The two chambers are axially alined and open one into the other. The lower open end of the valve-chamber registers with and is placed a slight distance above a water-outlet port 11, and the waterinlet passage enters the casing at the junction between the pistonchamber and the valve-chamber. The valve-chamber has a circumferential row of perforations 12, which form a port through which the inlet-water may enter the lower end of the cylinder.

Water may waste out of the bottom of the cylinder through the opening and port formed below the end of the valve-chamber. The upper end of the actuating-piston chamber communicates with an annular port 23 in a ing through the piston and through a strainernipple 20 in the side of the stem. Said bore thus furnishes constant communication between the inlet-water against the under side of the actuating-piston and the space above said piston; but said boreis of less diameter and capacity than the passage between the piston-chamber and the primary-valve chamber, sothatwater may more quickly be emptied out of the upper end of the piston-chamber than it can enter through the bore of the piston. The ends of the primary-valve cham- 8 5 ber are open to the interior of the air and water cylinder, and a three-piston valve 21 slides in said primary-valve chamber. The upper and lower pistons of this valve are simply packings, and the middle piston of the valve cuts off or opens communication between the port 23 and port 14 when the primary valve is depressed or raised. A rod 22 forms a slip-joint connection between the weighted piston in the air and water cylinder and the primary Valve, and said rod has stops at its upper and lower end, so that the valve may be raised or lowered as the piston arrives at the upper or lower end of its stroke.

In practice, when the valves are in the posimo tions illustrated in Fig. I the main controlling-valve closes the outlet and has uncovered the distributing-port into:the cylinder, so that the inlet-water can pass into the cylinder and force the weighted piston upward. The primary valve is in such position that exhaust from the upper end of the piston-chamber is closed oil, and the feed-water passing from the inlet through the strainer-nipple and the bore of the stem will equalize the pressure from below against the piston and will admit of the pressure from above against the valve, forcing the latterand the piston down. \Vhen the weighted piston arrives to the uppermost end of its stroke, the stop upon the upper end of the valve-rod will be engaged and the rod and valve will be raised. This shifting of the primary valve will make communication to the waste from the upper end of the pistonehamber, so that the excess pressure from below will raise the piston and valve and will uncover the outlet-port and cut communiea-- tion between the water-inlet and the distributing-port. The water in the cylinder beneath the weighted piston will waste out through the outlet-port and passage and the weighted piston will be lowered. The upstroke of the piston compresses air and forces it out through the air-outlet valve and nipple, and the down ward stroke of the weighted piston will draw in air through the air-inlet valve and again fill the cylinder above the weighted piston. As the ends of the primary-valve chamber are open to the interior of the cylinder the primary valve is at all times balanced and will remain in the position given to it by the ascending or descending weighted piston.

Other modes of applying the principle of our invention maybe employed for the mode herein explained. Change may therefore be made as regards the mechanism thus disclosed, provided the principles of construction set forth respectively in the following claim are employed.

We therefore particularly point out and distinctly claim as our invention In a hydraulic air-compressor, the combination of an air-and-water chamber having air inlet and outlet at its top and water inlet and outlet at its bottom, a main controllingvalve controlling the water inlet and outlet for the chamber and having an actuating-piston connected to it by a stem formed with a water-passage through it and the top of the piston, a piston-chamber for said piston and having inlet for the actuating-water at one end and a water-outlet at the other end, a primary-valve chamber open at both ends and having a waste-port near its upper end and a port near its lower end communicating with the outlet from the actuating-piston chamber, and a primary valve having means for raising it and lowering it at the extreme upper and lower water-level in the air-and-watcr chamber and provided with a packing-piston at its upper end, a distributing-piston playing at both sides of the waste-port, and a packing-piston at its lower end permanently below the port communicating with the outlet from the actuating-piston chamber, substantially as set forth.

In testimony that we claim the foregoing to be our invention we have hereunto set our hands this 12th day of October, A. l). 1806.

ADOLIII. (i. NOAUK. LORENZ S. GROSSMAN. \Vitnesses:

WM. SEcnEn, E. I. BROWN. 

